Hp Prime Graphing Wireless Calculator Manuel d'utilisateur télécharger pdf (Page 62)

58 Geometry

Examples:

If GA is defined to be the unit circle, then area(GA) returns

π.

area(4-x^2/4, -4,4) returns 14.666…

Angle

Returns the measure of a directed angle. The first point is

taken as the vertex of the angle as the next two points in order

give the measure and sign.

angle(vertex, point2, point3)

Example:

angle(GA, GB, GC) returns the measure of ∡ BAC.

Arc Length

Returns the length of the arc of a curve between two points on

the curve. The curve is an expression, the independent

variable is declared, and the two points are defined by values

of the independent variable.

This command can also accept a parametric definition of a

curve. In this case, the expression is a list of 2 expressions (the

first for x and the second for y) in terms of a third independent

variable.

arcLen(expr, real1, real2)

Examples:

arcLen(x^2, x, –2, 2) returns 9.29….

arcLen({sin(t), cos(t)}, t, 0, π/2) returns

1. 57 …

Tests

Collinear

Takes a set of points as argument and tests whether or not they

are collinear. Returns 1 if the points are collinear and 0

otherwise.

is_collinear(point1, point2, …, pointn)

Example:

is_collinear(point(0,0), point(5,0),

point(6,1)) returns 0

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Hp Prime Graphing Wireless Calculator Manuel d'utilisateur Page 62